A. 1
B. 2
C. 3
D. Infinite
✅ The correct answer is option D.
Physics MCQs
A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber?
A. 2×108 Nm-2
B. 5×106 Nm-2
C. 0.5×10-6 Nm-2
D. 0.2×10-6Nm-2
✅ The correct answer is option B.
In a double slit experiment, we observe
A. Interference fringes only
B. Diffraction fringes only
C. Both interference and diffraction fringes
D. Polarized fringes
✅ The correct answer is option C.
Which one is not correct for a vector A= 2i+2j+3k?
A. Has direction 45° with an x-axis
B. Has magnitude 2
C. Has magnitude 2 and direction °=45° with a y-axis
D. Has magnitude -2
✅ The correct answer is option D.
A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is
A. FE
B. (FE)
C. FE2/L
D. FE2
✅ The correct answer is option B.
When light incident normally on thin film the path difference depends upon
A. The thickness of the film only
B. Nature of the film only
C. The angle of incidence only
D. All thickness nature and angle of incidence
✅ The correct answer is option D.
The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is
A. 30°
B. 60°
C. 90°
D. 120°
✅ The correct answer is option D.
Dioptre power of a concave lens of 10 cm focal length is
A. 10 dioptre
B. 10 dioptre
C. 1 / 10 dioptre
D. 1 / 10 dioptre
✅ The correct answer is option B.
The dimensions of the coefficient of viscosity are
A. ML-1T-1
B. M2L1T1
C. ML1T-1
D. M2L-1T-1
✅ The correct answer is option A.
In vibratory motion
A. P.E. remains constant
B. K.E. remain constant
C. total energy remains constant
D. total momentum remains constant
✅ The correct answer is option C.